PLTW EES Unit 2.2 Mechanical Advantage Test

Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever (MA=Output Force/Input Force)?

• 1

• 10

• 100

• 1000

The amount by which a machine multiplies input force is known as the 

• work.
• power.
• output force.
• mechanical advantage.

Which of these simple machines is a lever?

• 
• 
• 
• 

An effort of 450 newtons is applied to this pulley. What is the force of the load that will be lifted?

• 450

• 600

• 750

• 900

How much effort is required to lift the 300 newton load?

• 50

• 60

• 75

• 90

What is the mechanical advantage of this pulley?

• 1

• 2

• 3

• 4

What is effort (input) force?

• the force one exerts on a machine

• the force which an effort force must overcome in order to do work on an object via a simple machine.

• the force the machine exerts on a object

• the output work times the input distance

What is the equation for mechanical advantage?

• MA=input force*output force
• MA=output force/input force
• MA=input force/output force
• MA= output force - input force

Force is a _____ or _______

• simple    complex
• push     pull
• up      down
• in      out

All simple machines help make work _________.

• harder
• smaller
• lighter
• easier